Pipe-wrench



C. G. MARTINDALE.

PIPE WRENCH.

APPLICATION FILED JAN. 15. 1919.

1,335,252. Patented Mar.30,1920.

1 I awn/1441M CHARLES'G. MARTINDAL'E, 0F SCOTIA, CALIFORNIA.

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Applicatiomfiled January 15, 1919.

To all whomc'tmay concern:

Be it known that 1, CHARLES G. MARTIN- DALE, a citizen of the UnitedStates, residing at Scotia, in the county of Humboldt and State ofCalifornia, have invented certain new and useful Improvements in Pipe-Wrenches, of which the following is a specification, reference being hadto the accompanying drawings.

This invention relates to certain improve- 111811178 in pipe wrenches,and it is an object of the invention tov provide a device of thischaracter having novel and improved means whereby an effective grip ishad uponthe pipe when pull is imposed upon the handle.

It is also an object of. the invention to provide an improved wrench ofthis general character comprising two relatively movable jaws togetherwith means whereby said jaws may be held in their relative positions.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved pipewrench whereby certain important advantages are attained and the devicerendered simpler, less expensiveand otherwise more convenient andadvantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein:

Figure 1 is an elevational view of a wrench constructed in accordancewith an embodiment of my invention, with a portion broken away; and

Fig. 2 is a fragmentary View in elevation of my improved wrench asherein embodied with certain of the parts in a second position.

As disclosed in the accompanying drawings, 1 denotes an elongated shankhaving its outer end portion serving as a handle while its opposite endportion is provided with a rigid jaw 2. The inner edge face of the shank1 from the end provided with the jaw 2 to a point substantially midwayof said shank is provided with a rack 3 with which engages the toothededge face of a supplemental shank 4.

The shank 4: also extends between a pair of rearwardly directed platescarried by the Specification of Letters?atent.

Patented Mar. 30, 1920.

Serial No. 271,245.

shank 1 adjacent the jaw 2, and said plates are of a length to extendrearwardly of the supplemental shank at.

Pivotally supported between the extended portions of the plates 5 is aneccentric or cam 6 provided with an operating lever 7. The lever 7 is ofa length to extend beyond the inner sides of the plates 5.

The high point a of the eccentric or cam 6 is so positioned that whenthe lever is moved inwardly toward the supplemental shank 1, saidsupplemental shank will be effectively locked to the shank 1 againstmovement longitudinally of the shank 1. hen the'lever 7 is moved in theopposite direction, the high point a is so positioned as to permit theshank 4; to be readily moved longitudinallyof the shank 1.

The outer end portion of the supplemental shank 4 is provided at itsinner side with a longitudinally directed extension 8 having its outerface 9 serving as a cam or eccentric.

10 denotes a swinging jaw coacting with the jaw 2 and carried by theouter end of the supplemental shank 1. Said jaw 10 is hingedly connectedas at 11 with the extension 9 and is provided with an inwardly disposedtail or extension 12 provided with a cam or eccentric face 14: engagingthe eccentric or cam face 9 of the extension 8.

As is clearly disclosed in the accompanying drawings, it will be selfevident that when the jaws 2 and 10 are engaged with the work and pullis imposed on the outer or handle portion, the eccentric or cam faces 9and 14 will coact in a manner to swing the jaw 10 inwardly toward thelaw 1 so that an effective grip of said jaws upon the pipe or other workis assured, so that the greater the pull upon the outer or handle endportion of the shank 1, the tighter the grip of the jaws 2 and 10 willbe upon the work.

From the foregoing description, it is thought to be obvious that a pipewrench constructed in accordance with my invention is particularly welladapted for use by reason of the convenience and facility with which itmay be assembled and operated, and it will also be obvious that myinvention is susceptible of some change and modification withoutdeparting from the principles and spirit thereof, and for this reason Ido not wish to be understood as limiting myself to the precisearrangement and formation of the several parts herein shown in carryingout my invention in practice except as hereinafter claimed.

I claim:

1 A wrench of the character described comprising a shank provided with ajaw, a supplemental shank coacting with the first named shank, a jawhingedly connected with the supplemental shank and coacting with the jawof the first named shank, saidsupplemental shank and second jaw beingprovided with coacting cam faces whereby said second jaw is'caused toswing toward the first named jaw when pull is imposed upon the firstnamed shank and when the first named jaws are engaged with the work.

2. A wrench of the character described comprising a shank provided witha jaw, a supplemental shank coacting with the first named shank, a jawhingedly connected with the supplemental shank and coacting with a jawof the first named shank, said supplemental shank and second jaw beingprovided with coacting cam faces whereby said second jaw is caused toswing toward the first named jaw when pull is imposed upon the firstnamed shank and when the first named jaws are engaged with the work,said first .named shank and supplemental shank being relativelyadjustable, and means for holding the same against relative movement. I

3. A wrench of the character described comprising a shank provided witha jaw, a

supplemental shank coacting with the first named shank, a jawpivotallyconnected with the supplemental shank and coacting with the jaw of thefirst named shank, said supplemental shank and second jaw in closeproximity to the pivotal connection there-'

